Calcium vs Sobolevite - What's the difference?
calcium | sobolevite |
A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks.
* {{quote-magazine, year=2013, month=September-October, author=
, magazine=(American Scientist), title= (countable) An atom of this element.
(mineralogy) A triclinic-pedial brown mineral containing calcium, fluorine, iron, magnesium, manganese, niobium, oxygen, phosphorus, silicon, sodium, and titanium.
As nouns the difference between calcium and sobolevite
is that calcium is calcium while sobolevite is (mineralogy) a triclinic-pedial brown mineral containing calcium, fluorine, iron, magnesium, manganese, niobium, oxygen, phosphorus, silicon, sodium, and titanium.calcium
English
Noun
(wikipedia calcium) (Symbol'': ''Ca )Katie L. Burke
In the News, passage=Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:
